In 2050, a world redefined by "absolute efficiency". When each cyborg is born (or modified), an "efficiency chip" is implanted in the brain. The chip has a "parts score" displayed on the eyeball projection - the full score is 100 points. If the score is less than 60 points, it will enter the "recycling observation period", and if the score is less than 40 points, it will be directly "disassembled and recycled". "Efficiency is the only morality, and output is the only value. You are human, but your parts are more valuable than your soul. Every point you earn is contributing to the eternal life of your consciousness. And you don't even have the right to complain - the chip will shut you up."